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Sequoia 819 Striker Avenue.Suite 8 <br /> Sacramento,CA 95834 <br /> 15) (916)921-9600 <br /> %r Analytical FAX(916)921-0100 <br /> SECOR International Project: ARCO 434,Lodi,CA Sampled: 6/18/99 <br /> 9912 Business Park Drive,Ste. 100 Project Number: N/A Received: 7/8/99 <br /> Sacramento,CA 95827 Project Manager: Rusty Benkosky Re orted: 7/19/99 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov. Limits % Limit % Notes- <br /> Batch: 9070134 Date Prepared: 7/12/99 Extraction Method: EPA 50306(MeOH) <br /> Blank 9070134-BLKI <br /> Purgeable Hydrocarbons 7/12/99 ND mg/kg 1.00 <br /> Benzene ND 0.00500 <br /> Toluene ND 0.00500 <br /> Ethylbenzene ND 0.00500 <br /> Xylenes(total) ND 0.00500 <br /> Methyl tert-butyl ether ND 0.0500 <br /> Surrogate: a,a,a-Tris luorotoluene 0.100 0.198 60.0-140 99.0 <br /> LCS 9070134-BSI <br /> Benzene 7/12/99 0.200 0.217 mg/kg 70.0-130 108 <br /> Toluene 0.200 0.234 70.0-130 117 <br /> Ethylbenzene 0.200 0.232 70.0-130 116 <br /> Xylenes(total) 0.600 0.624 70.0-130 104 <br /> Methyl tert-butyl ether 0.200 0.223 70.0-130 112 <br /> Surrogate: a,a,a-Tris luorotoluene 0.200 0.101 60.0-140 101 <br /> Matrix Spike 9070134-MSI 5907052-26 <br /> Benzene 7/12/99 0.200 ND 0.196 mg/kg 60.0-140 98.0 <br /> Toluene 0.200 ND 0.213 60.0-140 106 <br /> Ethylbenzene 0.200 NO 0.218 60.0-140 109 <br /> Xylenes(total) 0.600 ND 0.592 60.0-140 98.7 <br /> Methyl tert-butyl ether 0.200 ND 0.198 60.0-140 99.0 <br /> Surrogate: a,a,a-Tris luorotoluene 0.200 0.196 60.0-140 98.0 <br /> Matrix Spike Den 9070134-MSDI S907052-26 <br /> Benzene 7/12/99 0.200 ND 0.193 mg/kg 60.0-140 96.5 25.0 1.54 <br /> Toluene 0.200 NO 0.212 60.0-140 106 25.0 0 <br /> Ethylbenzene 0.200 NO 0.217 60.0-140 108 25.0 0.922 <br /> Xylenes(total) 0.600 ND 0.578 60.0-140 96.3 25.0 2.46 <br /> Methyl tert-butyl ether 0.200 ND 0.198 60.0-140 99.0 25.0 0 <br /> Surrogate: a,a,a-Tris luorotoluene 0.100 0.199 60.0-140 99.5 <br /> Sequoia Analytical-Sacramento 'Refer to end ofreport jar test ofnotes and definitions. <br /> ,p�, Page 5 of 8 <br />